Table 2 Time domain characteristic values of different vibration signals.
From: Remaining useful life prediction method of centrifugal pump rolling bearings based on digital twins
Characteristic | Bearing13 | Bearing31 | ||||
|---|---|---|---|---|---|---|
Measured | Simulated | DT | Measured | Simulated | DT | |
Max | 48.1280 | 13.2145 | 47.1674 | 6.973 | 3.450 | 6.8336 |
Min | −48.1480 | −13.2275 | −47.1870 | −41.297 | −21.210 | −39.2320 |
Average | 0.0004 | 0.0001 | 0.0004 | 0.0026 | 0.0006 | 0.0064 |
Variance | 1.4090 | 0.0164 | 1.3538 | 0.1435 | 0.0841 | 0.1334 |
Std. Deviation | 1.1870 | 0.3262 | 1.1635 | 0.3788 | 0.2901 | 0.3652 |
Skewness | −1.2262 | −12.2245 | −1.2256 | −4.8503 | −13.8084 | −4.5681 |
Kurtosis | 155.6232 | 56.2945 | 155.5187 | 362.6990 | 92.1389 | 361.6345 |
RMS | 1.1870 | 0.3262 | 1.1635 | 0.3787 | 0.3257 | 0.3653 |
Waveform factor | 2.1684 | 0.1619 | 2.1669 | 1.4480 | 0.8309 | 1.4470 |
Peaking factor | 81.1132 | 21.0643 | 81.0947 | 127.4312 | 63.0834 | 126.1265 |
Pulse factor | 175.8723 | 75.2547 | 175.7272 | 184.5363 | 84.0772 | 182.4931 |
